DATAMATH  CALCULATOR  MUSEUM

Radio Shack EC-497

Date of introduction:  1979 Display technology:  LCD
New price:   Display size:  8 (5 + 2)
Size:  5.3" x 2.8" x 0.45"
 135 x 70 x 11 mm3
   
Weight:  2.3 ounces, 64 grams Serial No:  2952578
Batteries:  2*LR44 Date of manufacture:  wk 25 year 1979
AC-Adapter:   Origin of manufacture:  USA (ATA)
Precision:  11 Integrated circuits:  TP0321
Memories:  1    
Program steps:   Courtesy of:  Marie Lisa Collas

The Radio Shack EC-497 LCD Scientific Calculator is nothing else than Texas Instruments TI-50.

Dismantling this EC-497 manufactured in Texas Instruments' Abilene, TX facility reveals the TO0321 single-chip calculator circuit known already from the TI-50 introduced in 1978.


horizontal rule

If you have additions to the above article please email: joerg@datamath.org.

Joerg Woerner, May 29, 2016. No reprints without written permission.